QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

10 km WNW of Caldwell, Kansas

· 5.5 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sumner County 27 kmGrant County 32 kmHarper County 34 kmKay County 58 kmKingman County 66 kmAlfalfa County 66 kmSedgwick County 72 kmGarfield County 77 kmCowley County 80 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.6 (ml)
Depth
5.5 km below the surface
Felt
no reports yet
Nearest
Sumner County, 27 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3082 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 37.0688, -97.7165. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sumner County, KS 27 km (17 mi) SW of here earthquakes near Sumner County
Grant County, OK 32 km (20 mi) NNE of here earthquakes near Grant County
Harper County, KS 34 km (21 mi) ESE of here earthquakes near Harper County
Kay County, OK 58 km (36 mi) WNW of here earthquakes near Kay County
Kingman County, KS 66 km (41 mi) SE of here earthquakes near Kingman County
Alfalfa County, OK 66 km (41 mi) NE of here earthquakes near Alfalfa County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

59 earthquakes have been recorded within 50 km since this one.

  1. 2.3 7 km E of Nescatunga, Oklahoma
  2. 2.7 1 km ENE of Bluff City, Kansas
  3. 1.6 7 km ESE of Freeport, Kansas
  4. 2.6 1 km SE of Renfrow, Oklahoma
  5. 2.6 7 km NNW of Lamont, Oklahoma
  6. 2.4 6 km NNE of Wakita, Oklahoma
  7. 2.2 8 km WSW of Hunnewell, Kansas
  8. 3.0 5 km NE of Medford, Oklahoma
  9. 2.0 9 km WSW of Hunnewell, Kansas
  10. 3.2 7 km W of Hunnewell, Kansas
  11. 2.2 8 km W of Hunnewell, Kansas
  12. 2.5 10 km W of Lamont, Oklahoma
  13. 3.3 9 km ESE of Jefferson, Oklahoma
  14. 1.9 5 km WSW of Danville, Kansas
  15. 1.6 4 km E of Freeport, Kansas

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2017-09-08 — it released about 350 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.